葡南葡浅12区块蒸汽驱矿场试验研究

Field test research on steam flooding in Block PuQ12 in south Putaohua area

葡南葡浅12区块黑帝庙油层1993年开始投入蒸汽吞吐开采,到2003年末,部分生产井蒸汽吞吐超过8周期。为探索浅、薄层稠油油藏蒸汽驱开发的可行性,提高大庆稠油油藏开发水平,开展了蒸汽驱开发矿场试验。试验中通过井下测试及井筒热损失计算,评价了地面和井筒的隔热措施对降低热损失的能力。分析认为,目前选择的配套管柱适合稠油蒸汽驱热采开发;同时利用高温蒸汽泡沫调剖技术解决了注蒸汽开采过程中汽窜问题。2年多的矿场试验获得了良好的开发效果,阶段累计油汽比0.19 t/t,达到了较高水平。矿场试验结果表明:浅薄层稠油油藏在高轮次吞吐后转蒸汽驱的方法切实可行,前景乐观。

The steam huff and puff began in 1993 in Heidimiao oil reservoir in Block PuQ12 in south Putaohua area, and in some wells the steam huff and puff had been over 8 cycles till the end of 2003. In order to understand the feasibility of steam flooding in shallow and thin heavy oil reservoirs, and improve the heavy oil reservoir development in Daqing, the field test for steam flooding is carried. During the test, the heat insulation measures both at the surface and down hole to decrease heat loss are evaluated through down hole testing and well bore heat loss calculation. It is concluded： the matching pipe string selected at present is suitable for heavy oil steam flooding; high temperature steam foam profile control technique can be simultaneously used to control steam channeling during steam injection. The development results for more than 2 years field test are good with the interval cumulative oil gas ratio of 0. 19t/t, which is higher both at home and abroad. The field test suggests it is feasible for multiple cycled steam huff and puff changing to steam flooding in shallow thin heavy oil reservoirs, and this method has great potential to be applied.